Black Diamond Speed 40 vs Gregory Zulu 35

Weight and specs compared for 2026 — and which one to choose.

Gregory Zulu 35 is the lighter option — 130 g lighter than the Black Diamond Speed 40 (11% less weight). If grams matter to you, that is the one to beat.

Spec	Black Diamond Speed 40	Gregory Zulu 35
Weight	1,180 g · 1.180 kg · 2.60 lb	1,050 g · 1.050 kg · 2.31 lb
Brand	Black Diamond	Gregory
Category	Backpack	Backpack

Black Diamond Speed 40

1,180 g

Lightweight 40L alpine pack with removable framesheet.

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Gregory Zulu 35

1,050 g

Ventilated 35L daypack with 3D Hydro reservoir sleeve.

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Black Diamond Speed 40 vs Gregory Zulu 35: which should you buy?

If saving weight is your priority, the Gregory Zulu 35 wins — at 1,050 g it is 130 g (11%) lighter than the Black Diamond Speed 40 (1,180 g). That said, the heavier option may justify the extra grams with more capacity, durability or comfort, so weigh the trade-off against how you'll use it.

See where both rank against everything else in this category on the lightest backpack page, or browse the full gear weight database.

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